ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 53, (3) 189 - 194 (2009)


DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF COMBINATORY EFFECT OF A-SITE ISOVALENT AND B-SITE ACCEPTOR DOPED PLZT CERAMICS
 
Ramam Koduri 1, Chandramouli K. 2
 
1 Departmento de Ingenieria de Materials, (DIMAT), Facultad de Ingenieria, Universidad de Concepcion, Concepcion, Chile
2 Solid State Physics & Materials Research Labs., Department of Physics Andhra University, Visakhapatnam, India

Keywords: Electroceramics, Micro and Nanostructure, Dielectrics, Piezoelectrics
 

This investigation highlights the influence of isovalent Sr and acceptor Mn modified PLZT near morphotrophic phase boundary for phase formation, microstructure, density, dielectric and piezoelectric properties. [Pb0.9896-yLa0.0104Sry][Zr0.529Ti0.471]0.9949Mn0.005O3 (PLSZMT) where y = 0, 0.2, 0.4, 0.6, 0.8 and 1 mol.%, polycrystalline solid solutions were synthesized by solid state reaction method. X-ray diffraction patterns indicated that undoped composition had shown coexistence of both rhombohedral and tetragonal phases while increasing Sr content resulted in phase shift to tetragonal phase. Grain size and apparent density enhanced with the increasing Sr content up to y = 1 mol.%. The optimum εRT, d₃₃ and kp were observed at y = 1 mol.%, respectively which could be suitable for piezoelectric applications.


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